National Instruments DAQPad-1200, Руководство пользователя

Страница: 29 / 101

Chapter 3 Connecting the Signals
© National Instruments Corporation 3-5 DAQCard-1200 User Manual
How you connect analog input signals to the DAQCard-1200 depends on
how you configure the card analog input circuitry and the type of input
signal source. With different DAQCard-1200 input modes, you can use the
instrumentation amplifier in different ways. Figure 3-2 shows a diagram of
the DAQCard-1200 instrumentation amplifier.
Figure 3-2. DAQCard-1200 Instrumentation Amplifier
Table 3-2. Bipolar and Unipolar Analog Input Signal Range Versus Gain
Gain Setting
Input Signal Range
Bipolar Unipolar
1 ±5 V 0 to 10 V
2 ±2.5 V 0 to 5 V
5 ±1 V 0 to 2 V
10 ±500 mV 0 to 1 V
20 ±250 mV 0 to 500 mV
50 ±100 mV 0 to 200 mV
100 ±50 mV 0 to 100 mV
V
m
= [ V
+
in
– V
–
in
] GAIN
V
+
in
V
–
in
Instrumentation
Amplifier
Measured
Voltage
V
m
+
–
+
–